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Effects of Dual-Electrode Biasing on Er in a Toroidal Plasma |
| LU Rong-Hua;PAN Ge-Sheng;WANG Zhi-Jiang;WEN Yi-Zhi;LIU Wan-Dong;WAN Shu-De;YU Chang-Xuan;WANG Jun;XIAO De-Long;XU Min |
| Department of Modern Physics, University of Science and Technology of China, Hefei 230026 |
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| Cite this article: |
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LU Rong-Hua, PAN Ge-Sheng, WANG Zhi-Jiang et al 2005 Chin. Phys. Lett. 22 1471-1473 |
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Abstract Two externally biased electrodes were inserted into the plasma on the KT-5C tokamak to test the effects on modifying the radial electric field Er other than single biasing. Using various combinations of biasing voltage, the influences of double biasing are compared with the single biasing. It turns out that the effect of dual-biasing is also effective as a single one, but the outer electrode seems to be shielded by the inner one and show less influence. The results clearly show that the radial electric field Er changed by external biasing is intrinsically an effect localized at the edge of the plasma, which is caused by the electrode induced radial current; and dual-electrode biasing using the method similar to the single biasing seems not to be able to increase more distinctly the peaking effect on Er than the single biasing.
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| Keywords:
52.55.Fa
52.25.Gj
52.35.Ra
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Published: 01 June 2005
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